Flexible Bar-Pass Sheath Assembly for Watertight Insulated Mounting
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Solution Overview
Problem
Existing bar-pass devices for electrical equipment are difficult to assemble and disassemble, require lubrication, and pose contamination risks due to sliding seals, compromising watertightness and electrical insulation.
Innovation Solution
A bar-pass device comprising a sheath and spacers made of different materials, where the sheath is more flexible than the spacers, allowing easy assembly and disassembly without lubrication, ensuring watertightness and electrical insulation through separate seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard seals are slid onto metal bars during assembly, then watertightness is ensured, but assembly becomes time-consuming and difficult
Solution Approach 1:
The patent introduces an intermediary tapered guide section at the end of the bar that transitions from a smaller diameter to a larger diameter. This guide section acts as a mediator between the seal and the bar, allowing the seal to be easily guided and positioned without sliding friction. The seal is pushed onto the tapered guide rather than being slid along the entire bar length, significantly reducing assembly difficulty while maintaining watertightness.
2Ease of operation
If grease is applied to the bar to facilitate seal positioning, then assembly becomes easier, but contamination risk increases
Solution Approach 1:
The tapered guide section serves as a mechanical intermediary that eliminates the need for lubrication. By providing a gradually expanding surface, it allows the seal to be positioned easily through pure mechanical guidance rather than requiring grease to reduce friction. This completely removes the contamination risk associated with grease application.
Data Source
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AI summary
A bar-passing device (10) comprises: a) a lower spacer (50) and an upper spacer (45), each extending in a longitudinal direction (Z'Z) and each defining a through conduit (50A, 45A) for engaging the bar (30); b) a sheath (55), extending in the longitudinal direction (Z'Z) between a lower end (55B) and an upper end (55A) and comprising an inner wall (55C) defining a lower conduit (70) for receiving the lower spacer and an upper conduit (65) for receiving the upper spacer, and an outer seal (80) at a distance from the lower end and the upper end, c) a body (60) crossed by an insertion conduit (85) of the sheath (55) and comprising a shoulder (90) configured to bear on the wall (20) of the electrical equipment (25) over the entire periphery of the orifice (15);removable fixing means (98, 100) on the wall (20) of the electrical equipment (; and a housing (110) for receiving the external seal (80); the sheath being more flexible than the lower (50) and upper (45) spacers.;